1 | /* |
2 | * Copyright © 2022 Google, Inc. |
3 | * |
4 | * This is part of HarfBuzz, a text shaping library. |
5 | * |
6 | * Permission is hereby granted, without written agreement and without |
7 | * license or royalty fees, to use, copy, modify, and distribute this |
8 | * software and its documentation for any purpose, provided that the |
9 | * above copyright notice and the following two paragraphs appear in |
10 | * all copies of this software. |
11 | * |
12 | * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR |
13 | * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES |
14 | * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN |
15 | * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
16 | * DAMAGE. |
17 | * |
18 | * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, |
19 | * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
20 | * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS |
21 | * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO |
22 | * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
23 | * |
24 | * Google Author(s): Garret Rieger |
25 | */ |
26 | |
27 | #ifndef GRAPH_SPLIT_HELPERS_HH |
28 | #define GRAPH_SPLIT_HELPERS_HH |
29 | |
30 | namespace graph { |
31 | |
32 | template<typename Context> |
33 | HB_INTERNAL |
34 | hb_vector_t<unsigned> actuate_subtable_split (Context& split_context, |
35 | const hb_vector_t<unsigned>& split_points) |
36 | { |
37 | hb_vector_t<unsigned> new_objects; |
38 | if (!split_points) |
39 | return new_objects; |
40 | |
41 | for (unsigned i = 0; i < split_points.length; i++) |
42 | { |
43 | unsigned start = split_points[i]; |
44 | unsigned end = (i < split_points.length - 1) |
45 | ? split_points[i + 1] |
46 | : split_context.original_count (); |
47 | unsigned id = split_context.clone_range (start, end); |
48 | |
49 | if (id == (unsigned) -1) |
50 | { |
51 | new_objects.reset (); |
52 | new_objects.allocated = -1; // mark error |
53 | return new_objects; |
54 | } |
55 | new_objects.push (id); |
56 | } |
57 | |
58 | if (!split_context.shrink (split_points[0])) |
59 | { |
60 | new_objects.reset (); |
61 | new_objects.allocated = -1; // mark error |
62 | } |
63 | |
64 | return new_objects; |
65 | } |
66 | |
67 | } |
68 | |
69 | #endif // GRAPH_SPLIT_HELPERS_HH |
70 | |